Method and device for transmitting and receiving signals in wireless communication system
A method and a device for transmitting and receiving signals in a wireless communication system, according to one embodiment of the present invention, transmit ACK/NACK information pooled by a UL grant DCI via a PUSCH without a UL-SCH.
1. A method of transmitting and receiving a signal by a communication device in a wireless communication system, the method comprising:
receiving downlink (DL) data based on first DL grant downlink control information (DCI);
receiving second DL grant DCI; and
transmitting acknowledgement/negative acknowledgement (ACK/NACK) information for the DL data, based on the second DL grant DCI not scheduling a physical downlink shared channel (PDSCH),
wherein a field for resource assignment in the second DL grant DCI includes information regarding transmission of the ACK/NACK information, and
wherein the field does not include information regarding a resource assignment for the PDSCH.
2. The method according to claim 1 , wherein the ACK/NACK information is not transmitted until a third DL grant DCI not scheduling a PDSCH is received, based on the second DL grant DCI scheduling a PDSCH.
3. The method according to claim 1 , wherein a 1-bit flag in the first DL grant DCI is set to a value to indicate that a type-3 codebook is used for transmitting the ACK/NACK information,
based on the 1-bit flag in the first DL grant DCI being set to a value, whether the ACK/NACK information is transmitted is determined by DL grant DCI other than the first DL grant DCI.
4. The method according to claim 3 , wherein, based on the 1-bit flag in the second DL grant DCI being set to the value, whether the ACK/NACK information is transmitted is determined based on the field for the resource assignment other than the 1-bit flag.
5. A communication device configured to transmit and receive a in a wireless communication system, the communication device comprising:
at least one transceiver;
at least one processor; and
at least one memory operatively coupled to the at least one processor and storing instructions that, based on being executed, cause the at least one processor to perform operations comprising:
receiving downlink (DL) data based on first DL grant downlink control information (DCI);
receiving second DL grant DCI; and
transmitting acknowledgement/negative acknowledgement (ACK/NACK) information for the DL data, based on the second DL grant DCI not scheduling a physical downlink shared channel (PDSCH),
wherein a field for resource assignment in the second DL grant DCI includes information regarding transmission of the ACK/NACK information, and
wherein the field does not include information regarding a resource assignment for the PDSCH.
6. The communication device according to claim 5 , wherein the ACK/NACK information is not transmitted until a third DL grant DCI not scheduling a PDSCH is received, based on the second DL grant DCI scheduling a PDSCH.
7. The communication device according to claim 5 , wherein a 1-bit flag in the first DL grant DCI is set to a value to indicate that a type-3 codebook is used for transmitting the ACK/NACK information,
based on the 1-bit flag in the first DL grant DCI being set to a value, whether the ACK/NACK information is transmitted is determined by DL grant DCI other than the first DL grant DCI.
8. The communication device according to claim 7 , wherein, based on the 1-bit flag in the second DL grant DCI being set to the value, whether the ACK/NACK information is transmitted is determined based on the field for the resource assignment other than the 1-bit flag.
9. The communication device according to claim 5 , wherein the communication device includes an autonomous driving vehicle configured to communicate with at least one of a user equipment (UE), a network, or another autonomous driving vehicle other than the communication device.